Side tuyere structure



Patented Mar. 8, 1927.*-

UNITED STATES PATENT OFFICE.

ROYCE Ia. BEERS, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS,TO

RILEY STOKER CORPORATION, OF WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.v

SIDE TUYRE STRUCTURE.

Original application filed January 14, 19,21, Serial No. 437,238.Divided and this application liled August l11, 1923, Serial No. 656,977.

My invention relates to side tuyre struc-l tures for arrangement betweenthe margin of the retort structure and the contiguous side wall of thefurnace for supplyino4 air to 5 the combustion space and protecting thefurnace side wall against clinker adhesion through the zone ofdetrimental clinker formation. A general object of my invention is toprovide a tuyre structure of the charaeter stated which will be' ofnarrow or plate construction, which will be simple, easily manufactured,inexpensive to install or to replace, and of advantageous construction,giving reat resistivity to destruction by heat, capa ility to maintainsuch relative cool surface condition as will minimize elinkering, andother advantages.V

To these ends my invention consists in the features of construction andarrangement hereinafter set forth, reference being had to theaccompanying drawing wherein Fig. 1 is a side elevation of a plate tuyreconstructed and arranged in accordance with my invention, fragments onlyof a known type of retort structure being shown in -connectiontherewith; Fig. 2 front edge view of the tuyre structure, and Fig. 3 isa rear edge view thereof.

In th'e drawing 10 indicates fragmentarily $0 the margin of the retort,of a multiplefreto-rt rear-dumping Stoker of known design, such forexample, as the Jones A-C Stoker, and 11 indicates the side wall of thefurnace from which the margin of the extreme rotort of such a. Stoker isspaced, in substantial parallelism with the furnace side wall. 12indicates in general the plate-tuyre structure which is adapted formterposition between the retort-margin and the side wall to extend upthe latter to a height at or above the uppermost level of expectabledetrimental clinker formation. In the specific construction shown suchtuyre structure spans directly from the upper edge of the retort to theslde wall, finding bearing against both of these shape in side elevationor face view, to provide a front edge portion 13 rising to aconsiderable height above the retort margin 5I and preferably merginginto the slope of the innerl surface of said retort, a top-edge portion14 extending laterally and upwardly, preferably at a more abrupt angleto the side arts. Such plate tuyre structure is Renewed December 3,1926.

wall, for contact at its uppermost point with theside wall, and a rearedge 15 vertically disposed to yrest against the side wall. The body-web17 has the remainder of its rear edge 16 shaped to extend from thebottom of the portion 15 to a point in rear of and below the bottom ofthe portion 13, so that on the bottom of the structure a point 16 isformed to fall behind the margin of the retort and prevent displacementof the lower edge of the structure toward the interior of the retort. Alug 16 may be suitably provided on the rear of the body-web aperturedfor receiving a suitable tie-rod.

A shallow flange 1 8 extends solidly along the top and wall-contactingsides of the plate, while the iange 19 follows its forward side (facingthe retort) these flanges being preferably quite thin, and of uniformdepth or projection from the body-web. Prefen ably such a flange isprovided on one side only of the body-web.

The flange 19 may be interrupted by a lower group of tuyre notches 20,near the bottom of the structure, and an upper tuyre notch 21 ispreferably provided to give an air escape opening close to the upperedge 14 of the plate. Preferably lugs 22 integral with the flange 19extend rearwardly along the plate as lips aligning with the bottoms ofthe several tuyre openings. It will be understood that these tuyreplates will be placed lside by side as assemblies consisten with thelength o f the retort.

In the operation of an underfeed` stoker of the character described, anarea. of very active combustion will exist just above the level of theretort-margins, where air is supplied through tuyresv practicallycorresponding in position with the lower tuyre s 20, and at the furnaceside wall clinker adhesion is apt to occur through a zone extendingmaterially above the level of the retort margins. `With 'respect to thestructure illustrated, it will be seen that each body- Web is adequatelyair-cooled by the constant passage of air from the windbox below thetuyre structure through the openings 20 and tensity of the lire burnaway any flange or tion of the plates, the body-webs will a ord agridvthat will prevent-the fire from falling through into the windboxbelow to any ser1- ously detrimental extent.

It will be understood that specic changes in design may be made withoutdeparture from the spirit of my invention within thc scope of theappended claims. f

I claim: v

1. A plate tuyre structure of the character described comprising a bodyweb of substantially uniform thinness, having a rear vertical portionfor contact with the furnace side wall, a bottom portion notched for engagement with the margin of a retort which isispaced from the side wall,a front edge and a top edge that together extend upwardly and rearwardlyaffording a relatively long span between the bottom of the structure andthe topof its rear edge, and a shallow marginal flange integral withsaid body web extending along the wall-contacting portion of the rearedge and along the top and front edges, said flange extending from oneside only of the plate and being laterally interrupted, near its bottomto alord tuyre-openings, the portions 22 between said openings extendingfurther back from the front edgefof 'the plate than the I general depthVof the remainder of the borderingange, substantially as and for thepurposes described.

2. A side-tuyre structure of thecharacter described, comprising a bodyweb of' substantially uniform thickness having a rear vertical portionfor contact with the furnace side wall,`a bottom portion having a notchnear the front edge for engagement with the margin of a retort which isspaced from the side Wall, a'front edge, a top edge which slopesupwardly and rearwardly at an angle greater than the angle of repose ofthe material that will bear thereon, said front and top edges togetheraffording a relatively long span `between'the bottom-notch and the topof said rear vertical portion, and a shallow marginal flange integralwith said body web' extending along the wall-contacting portion of therear edge and along the top .-2

